Why do Chinese people have to follow their family members when getting married and attending funerals?

Sui Li is also called Sui Mingzi or Cou Mingzi.

Marriage etiquette.

Before a man and a woman get married, relatives and friends pay an agreed amount of money, and then they make congratulatory gifts and deliver them to the man and woman who are about to get married.

In the old days, the gift was limited to the relatives and friends of the male family, but now it is also customary for the relatives and friends of the female family.

Outside a notary office in Istanbul, Turkey, a man and a woman who had their marriage notarized were hanging coins given by their relatives and friends.